| 摘要 |
PROBLEM TO BE SOLVED: To achieve highly precise control of a frequency jitter operation of a PWM signal with a simple configuration.SOLUTION: The controller 1 generates a chopping wave, generates a PWM signal for PWM-controlling on-off operations of a switching element according to the chopping wave and outputs the signal from an output terminal OUT. The controller 1 includes: a counter 21 counting up or down at a predetermined period; a chopping wave threshold voltage value setting section 20 outputting a threshold voltage corresponding to a count value of the counter 21; and a chopping wave generating section 10 outputting a chopping wave.SELECTED DRAWING: Figure 1 |
